A few weeks ago, I was gifted a Golden Bird harmonica from my teacher, Todd Parrott. What made it really special was that it featured his signature tuning, which had the 7 draw tuned a half step down. It was my first experience with an alternate tuned harmonica. I find it really useful if you want to play the minor pentatonic scale without having to need the 6 overblow on a standard richter tuned harp. You can still make these overblow and overdraw to make the missing notes like in this video right here.
Now after receiving and liking the harp, I gained a special interest in alternate tunings. In fact, I made a playlist on Youtube describing some tunings for those who want to find out more about them. https://youtube.com/playlist?list=PL5jw_-dq76aZAcm7QP4pjUwoMiMfPKQGQ